民用飞机RNP导航能力的适航评估模型

Airworthiness evaluation model of RNP navigation ability for civil aircrafts

为评估新设计民用飞机所需导航性能(required navigation performance,RNP)的导航能力,针对直飞(track to fix,TF)航段和固定转弯半径(radius to fix,RF)航段类型,建立了飞行侧向偏差模型和飞行高度偏差模型,通过地理坐标转换,计算飞机实际飞行航迹与定义航径之间的偏差。以某新民用飞机的一次飞行为例,选取某机场进近的飞行数据进行计算,对飞行偏差进行统计,分析该飞机的适航情况及所对应的导航能力。结果表明,该飞机的基于性能导航(performance based navigation,PBN)的导航精度可满足适航标准中RNP 0.1的要求,机型执行RNP程序的质量达标。

In order to evaluate the navigation ability of required navigation performance(RNP)for the newly designed civil aircraft,the lateral and vertical flight error model were developed for the track to fix(TF)segment and the radius to fix(RF)segment.Through converted geographic coordinates,the deviation between the actual flight path and the defined path was calculated.The actual flight of an airport was taken as an example to analyze the airworthiness of the new civil aircraft.The flight deviation was statistically analyzed to study the mean,maximum and distributions of deviation in order to obtain the corresponding navigation ability.The verification results show that the performance based navigation(PBN)accuracy of the aircraft can meet the requirements of RNP 0.1 in the airworthiness standard,and the quality of the RNP program is up to the standard.